More low-pitched tone: HKS Spec L vs Greddy CS GTS v2
 

These are the only ones available in my area.

Will pair it with uncatted UEL headers
I'm looking for:
- low-pitched tone rather than metallic sound
- quieter of the two

I heard the HKS is quieter but it seems to sound high-pitched on higher RPMs when paired with uncatted headers.

I don't personally own either of these. However from my prior research when I was on the market for catbacks, the HKS Spec L Hi Power (dual) didn't seem to play nicely when you go catless.

That's what I thought. Thanks for the input!

The HKS Legamax Sport is pretty great for your goals. I've had it on my car for a while and love the sound. It's really great at keeping the sound down even with catless heaers.

Legamax Sport is quite noisy with header, Legamax Premium is much quieter.

Here is the official HKS video of HiPower SpecL with stock header and catless header and with catless header + catless dual resonated front pipe. I have HiPower SpecL and dual resonated front pipe with stock header. Sound is a bit louder than the video due to supercharger.

https://youtu.be/DdVCUKEqFLw

O_o

It is quieter than when I had a Q300 and a full exhaust.

Ace LG 90 literally cancels the highest frequency components of the exhaust energy.